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John Deere Marsh, Iowa
John Deere Marsh is a swamp located in Dubuque County, IA at N42.57861° W90.69189° (NAD83) and at an elevation of 606 ft MSL.
It can be seen on the USGS 1:24K topographic map Dubuque North, IA.
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Here are some other places near John Deere Marsh that may be of interest:
Note: Coordinates in the location and feature list above are referenced to NAD83 datum.